A History Of Weed Science In The United States

Download or read book A History of Weed Science in the United States written by Robert L Zimdahl and published by Elsevier. This book was released on 2010-02-04 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is important that scientists think about and know their history - where they came from, what they have accomplished, and how these may affect the future. Weed scientists, similar to scientists in many technological disciplines, have not sought historical reflection. The technological world asks for results and for progress. Achievement is important not, in general, the road that leads to achievement. What was new yesterday is routine today, and what is described as revolutionary today may be considered antiquated tomorrow. Weed science has been strongly influenced by technology developed by supporting industries, subsequently employed in research and, ultimately, used by farmers and crop growers. The science has focused on results and progress. Scientists have been--and the majority remain--problem solvers whose solutions have evolved as rapidly as have the new weed problems needing solutions. In a more formal sense, weed scientists have been adherents of the instrumental ideology of modern science. That is an analysis of their work, and their orientation reveals the strong emphasis on practical, useful knowledge; on know how. The opposite, and frequently complementary orientation, that has been missing from weed science is an emphasis on contemplative knowledge; that is, knowing why. This book expands on and analyzes how these orientations have affected weed science's development. - The first analytical history of weed science to be written - Compares the development of weed science, entomology and plant pathology - Identifies the primary founders of weed science and describes their role

Download or read book Fundamentals of Weed Science written by Robert Zimdahl and published by Academic Press. This book was released on 2012-12-02 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Weed Science provides an introduction to the basic principles of weed science for undergraduate courses. It discusses several aspects of weed biology and control, and traces the history of herbicide development. The book begins with an introduction to weeds, covering their definition, characteristics, harmful aspects, and the cost of weed control. This is followed chapters on weed classification, the uses of weeds, weed biology, weed ecology, allelopathy, the significance of plant competition, weed management and control methods, and biological weed control. Later chapters deal with herbicidesthe most important weed control tools and the ones with the greatest potential for untoward effects. Students of weed science must understand herbicides and the factors governing their use as well as the potential for misuse. These chapters discuss chemical weed control, the properties and uses of herbicides, factors affecting herbicide performance, herbicide application, herbicide formulation, ecological impact of herbicides, pesticide registration and legislation, weed management systems, and the future of weed science.

Download or read book Weeds written by Zachary J. S. Falck and published by University of Pittsburgh Pre. This book was released on 2011-03-15 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: As long as humans have existed, they've worked and competed with plants to shape their surroundings. As cities developed and expanded, their diverse spaces were covered with and colored by weeds. In Weeds, Zachary J. S. Falck presents a comprehensive history of "happenstance plants" in American urban environments. Beginning in the late nineteenth century and continuing to the present, he examines the proliferation, perception, and treatment of weeds in metropolitan centers from Boston to Los Angeles. In dynamic city ecosystems, population movements and economic cycles establish and transform habitats where vegetation continuously changes. Americans came to associate weeds with infectious diseases and allergies, illegal dumping, vagrants, drug dealers, and decreased property values. Local governments and citizens' groups attempted to eliminate unwanted plants to better their urban environments and improve the health and safety of inhabitants. Over time, a growing understanding of the natural environment made "happenstance plants" more tolerable and even desirable. In the twenty-first century, scientists have warned that the effects of global warming and the heat-trapping properties of cities are producing more robust strains of weeds. Falck shows that nature continues to flourish where humans have struggled: in the aftermath of Hurricane Katrina, in the abandoned homes of the California housing bust, and alongside crumbling infrastructure. Weeds are here to stay.

Download or read book Weeds of the South written by Charles T. Bryson and published by University of Georgia Press. This book was released on 2009 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Featuring more than fifteen hundred full-color photographs, this handy guide provides essential information on four hundred of the most troublesome weedy and invasive plants found in the southern United States"--P. [2] of cover.

Download or read book Weed Science written by Godfrey Pearlson and published by Academic Press. This book was released on 2020-07-11 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: WHAT DO WE KNOW ABOUT MARIJUANA AND HOW DO WE KNOW IT? Marijuana is the most frequently consumed illicit drug worldwide, with over 158.8 million users, according to the UN. Responding to public pressure, the US federal government is likely to legalize recreational marijuana within the next few years. With increasing numbers of people using cannabis both medically and recreationally there are many looming questions that only science can answer. These include: - What's likely to happen, both good and bad, if the US legalizes marijuana? - What are some simple, science-based rules to separate fact from fiction and to help guide policy in the highly contentious marijuana debate? - Exactly what is cannabis doing in the brain that gets us high? A journey through THC neuroscience - Does cannabis really have medical benefits - what's the evidence? - To what extent does cannabis impair driving? - Can smoking marijuana in adolescence affect IQ or risk for developing schizophrenia? - Is marijuana safe to use during pregnancy? - Reviews the endocannabinoid system and why our bodies are full of "weed receptors" - Introduces readers to the various forms of marijuana: flower, dabs, hash, edibles, shatter, vapes, tinctures, oils and synthetics, THC, CBD and terpenes. - Demonstrates how and why cannabis affects different people very differently. Discusses how MRI and PET scans can help show the effects of marijuana on the brain. - Discusses long-term effects of adolescent and adult cannabis use. - Examines the evidence for cannabis's role in increasing the risk for schizophrenia-like illnesses.

Download or read book Smoke Signals written by Martin A. Lee and published by Simon and Schuster. This book was released on 2013-08-13 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the author, an investigative journalist, traces the social history of marijuana from its origins to its emergence in the 1960s as a defining force in an ongoing culture war. He describes how the illicit marijuana subculture overcame government opposition and morphed into a multibillion-dollar industry. In 1996, Californians voted to legalize marijuana for medicinal purposes. Similar laws have followed in several other states, but not without antagonistic responses from federal, state, and local law enforcement. The author draws attention to underreported scientific breakthroughs that are reshaping the therapeutic landscape: medical researchers have developed promising treatments for cancer, heart disease, Alzheimer's, diabetes, chronic pain, and many other conditions that are beyond the reach of conventional cures. This book is an examination of the medical, recreational, scientific, and economic dimensions of the world's most controversial plant.

Download or read book Applied Weed Science written by Merrill A. Ross and published by Prentice Hall. This book was released on 2009 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introduction to the principles of weed science prepares readers to analyze real-life weed control problems and to develop integrated, practical approaches to solving them. Comprehensive in coverage and unique in presentation, it blends basic information on plant systems, soil systems, control methods, and management systems, and discusses various plants and herbicides by groups to provide an integrated framework from which to extend information to many different situations. For readers interested in weed science. "